1.5 The following information is collected from students upon exiting the campus b
Classify each of these variables as categorical or numerical. If the variable is nume
Answers
a. Amount of time spent shopping in the bookstore Numerical / Continuous
Numer

The following set of data is from a sample of n=7:12 7 4 9 0 7 3
12
7
4
9
0
7
3
42
A. Compute the mean, median, and mode.
Answer - Mean: 6
Mean (The average value of the entire set of numbers)
42/7 = 6
Median ( The middle value between the largest and sma

6.1 Given a standardized normal distribution (with a mean of 0 and a standard deviation of 1, as in Table E
a.Z is less than 1.57?
P (Z < 1.57) = 0.9418
b.Z is greater than 1.84?
P (Z > 1.84) = 1 - 0.9671= 0.0329
c.Z is between 1.57 and 1.84?
P (1.57 < Z

5.5 The number of arrivals per minute at a bank located in the central business district of a large city was recorded over a p
Arrivals
Frequency
0
14
1
31
2
47
3
41
4
29
5
21
6
10
7
5
8
2
a.Compute the expected number of arrivals per minute.
(0*21+1*46+2

Project Outcome
Successful
Not Successful
Total
Backing No Backing
History
History
Total
17,667
19,202
36,869
10,921
20,267
31,188
28,588
39,469
68,057
A) Construct contingency tables based on total percentages, row percentages, and column percentages.
Su

8.1 If X=85,
=8, and n=64, construct a 95% confidence interval estimate for the population mean,
.
Confidence
Interval for
83.04
86.96
X bar
n
Z
85
8
64
1.96
pulation mean,
8.9 A bottled water distributor wants to estimate the amount of water contained i

7.1 Given a normal distribution with m=100 and s=10, if you select a sample of n
a. less than 95?
Z=(X)/(/n) = (95-100)/(10/25)
Z = -2.5
For normal distribution using the Z table the probability that X is less than 95 is .0062
Answer: .0062
b. between 95

Quiz 5 is multiple-choice in format. Quiz 5 will cover the following chapters:
Chapter 7
Know the definition of a "sampling distribution."
A sampling distribution is the distribution of the results if you actually
selected all possible samples. The single

If you use a 0.10 level of significance in a two-tail hypothesis test, what is your decision rule for rejecting a null
Lower critical value Z0.05
-1.645
Upper critical value Z0.95
1.645
Decision Rule
The decision rule for this test is, Reject
the H0 if Z